Can opener



FIG. 1 is a top, side perspective view of a can opener showing my new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a side view thereof; and,

FIG. 6 is a front view thereof. 

The ornamental design for a can opener, as shown. 